Process of producing effects on textile material



atented Jan. 5, i943 omcs PROCESS OF PRODUCING EFFECTS ON TEXTILEMATERIAL ware No Drawing. Application August 16, 1939, Serial No.290,500. In Germany April 23, 1938 Claims.

The present invention relates to a process of producing efiects ontextile material and the material thus obtained.

The present invention relates to a process of producing efiects ontextile material from cellulose fibers, i.'e., fibers of natural orregenerated cellulose or on textile material containing moreovercellulose derivatives, such as cellulose acetate, cellulose propionateor other organic esters or ethers of cellulose or animal fibers such aswool or silk by partial destruction, especially local destruction of thematerial. The reaction used for this destruction is similar to thoseknown as carbonizing. It is an object of the present invention toproduce efiects on textile materials by completely removing thecellulosic fibers without alteration in the strength of the animalfibers or of the cellulose derivatives. It is a further object of theinvention to apply to the textile material a carbonizing agent which hashitherto not been used in the process of producing effects on fabricsand which proves great advantages in comparison with the processes knownup to now.

Various processes are already known for locally treating tissuesconsisting of natural or regenerated cellulose with an agent capable ofsplitting ofi acid, such as aluminium sulfate, aluminium chloride orsodium bisulfate, subjecting the impregnated tissue to the action of dryheat and then eliminating the destroyed fibers by washing and asubsequent mechanical treatment, such as heating, rubbing or brushing.For carrying out said process, special devices are required owing to thetemperatures to be applied which are considerably superior to thetemperatures generally applied in the textile industry; furthermore theindispensable mechanical treatment is not only complicated andtime-consuming, but readily causes the tissue, and particularlysensitive tis-- sue to be distorted or torn.

Now we have found that for the application in the embroidery industrythe dry heating to a raised temperature and the mechanical treat- ,Theparts of the tissue of natural or regenerated cellulose subjected to theaction of the sulfonic acids are decomposed by said treatment so thatthey can already be washed out with cold or hot water. The parts ofcellulose ester or cellulose ether of the tissue or the animal fibersare not destroyed.

The organic sulfonic acids may be of aliphatic or aromatic nature, forinstance naphthalene-Z- sulfonic acid, isopropyl naphthalene sulfonicacid, dibutyl-naphthalene-sulfonic acid, ethanesulfonic acid,2-naphthol-6.8-disulfonic acid, phenol-l-sulfonic acid,toluene-4sulfonic acid, naphthalene-2.G-disulfonic acid.

To produce local destruction of the textile material the organicsulfonic acid may be applied by means of a printing paste containing theusual thickening agents, such as tragacanth, a mixture of wheat starchand tragacanth, Senegal gum, British gum or a mixture of British gum andand tragacanth.

To obtain colored designs dyestufis suitable for cellulose esters andcellulose ethers or for animal fibers may be added to the printingpastes. Besides the pastes there may be printed on the tissue at thesame time a paste containing vat dyestuffs or acid sulfuric acid estersof vat dyestuffs or other dyestuffs. For instance on machine printing,with one or several rollers vat dyestufi pastes and with the last rollerthe paste containing the organic sulfonic acid may be applied to thetissue; said paste may at the same time contain for instance dyestuffssuitable for cellulose acetate. The material is then steamed as usual.

A special operation for fixing the dyestuffs is not GramsNaphthalene-2-sulfonic acid Water 420 Starch-tragacanth-thickening 500The printed material is dried, steamed for minutes in the rapid ager andwashed as usual. At the printed parts the cellulose fibers have beendestroyed 2. A tissue of viscose rayon and acetate silk is printed witha printing paste having the following composition:

Grams Isopropyl-naphtha;lene-sulfonic acid 100 Water 395 1 amino 2-methoxy-4-hydroxyanthraquinone 5 Tragacanth solution of 6 per centstrength..- 500 The material is then treated as described in Example 1.Pink designs are obtained on a white ground. Instead of viscose rayon thre may be used cotton.

3. A tissue of viscose rayon and acetate silk is printed with a printingpaste of the following composition:

Grams Ethane-sulfonlc acid; 50 Water 450 Tragacanth solution of 6 percent. strength..- 500 The material is then treated as described inExample 1. At the printed parts the cellulose fibers have beendestroyed.

4. A mixed tissue of cuprammonium rayon and acetate silk is printed onmachine printing with the following pastes:

Printing paste for the'first roller Grams The paste dyestufi No. 1269'mentioned in Schultz Farbstofitabellen, 7th edition, volume 1 25Glycerine 50 Water 1 365 Wheat-starch-tragacanth-thickening 500 Potash60 Formaldehyde-sodium-sulfoxylate 50 1000 Printing paste for the secondroller Grams The paste dyestuff No. 1269 mentioned in SchultzFarbstofitabellen, 7th edition,

After the material has been printed and dried it is steamed for 5minutes in the rapid ager which has been freed from air, then oxidizedin the signs are obtained in which the cellulose fibers have beendestroyed while the ground tissue of acetate silk has not been attacked.

5. A mixed tissue of viscose rayon and natural silk is printed with aprinting paste having the following composition:

Grams 2-naphthalene-6.8-disulfonic acid 150 Water 250 Crystal gumthickening (1.2) 600 After the material has been dried, it is steamedfor a short time and washed in the usual manner. Instead of viscoserayon there may be used staple fibers made by the viscose process.

If silk dyestuffs, for instance acid dyestuffs have to be added to theprinting paste, the steaming period is correspondingly prolonged andadapted to the fixing of these dyestuffs. Colored designs on a whiteground are thus produced.

, 6. A union tissue is printed with the following printing paste:

Grams Phenoll-sulfonic acid 120 Water, 380 British gum 1:1 500 Thematerial is printed, dried, steamed for about 510' minutes and thenrinsed. The cotton fibers are dissolved during this process at theprinted' parts, whereas the wool fibres are not damaged.

We claim:

1. A process for producing effects on textile material consisting ofcellulose fibers and fibers of cellulose derivatives which comprisesprinting on the material organic sulfonic acids and subsequently drying,steaming and rinsing the material.

2. A process for producing efiects on textile material consisting ofcellulose fibers and fibers of cellulose derivatives which comprisesprinting on the material aromatic sulfonic acids and subsequentlydrying, steaming and rinsing the material;

3. A process for producing effects on textile material consisting ofcellulose fibers and fibers of cellulose derivatives which comprisesprinting on the material dibutyl-naphthalene-sulfonic acid andsubsequently drying, steaming and rinsing the material.

4. A process for producing eifects on textile material consisting ofcellulose fibers and fibers of cellulose derivatives which comprisesprinting on the material 2-naphthalene-6.8-disulfonic acid andsubsequently drying, steaming and rinsin the material. 4

5. A process for producing effects on textile material consisting ofcellulose fibers and fibers of cellulose derivatives which comprisesprinting on the material phenoll-sulfonic acid and subsequently drying.steaming and rinsing the material.

usual manner, rinsed and soaped. Light-green and dark green designs arethus produced on the original, non-destroyed tissue; moreover de- ERNSTDC'JRING. HANS GRASSMADER.

